Metal working machine



s shams-sheet 1 Oct. 20, 1931. E. POOLE METAL WORKING MACHINE Filed July 22, 1929 Oct. 20, 1931. L. E. PooLi-z METAL WORKING ,MACHINE Fil'ed July 22, 1929 8 Sheets-Sheet 2 Omv Oct. v20, 1931. 1 E. POOLE v 1,828,379

METAL WORKING MIXGHINE 'Filed July 22, 1929 8 Sheets-Sheet 5 s sheets-sheet 1 L. E. POOLE METAL WORKING' MACHINE iled July 22. 1929 Oct. 2Q, 1931.

Oct. 20, 1931. L. E. POOLE METAL WORKING MACHINE Filed July 22, 1929 8 Sheets-Sheet 5 wm mmv SS. WS

Oct.'20, 1931., 1 E PooLE METAL WORKING MACHINE Filed July 22. 1929 8 sheets-sheet 6 Oct. '20, 1931. E. POOLE METAL WORKING MACHINE Filed July 22. 1929 8 :shees-sheet 7 OCLVZoylQBl. E, POOLE METAL WORKING MACHINE 8 sheets-'sheet 8 Filed July 22,-1929 Patented oa. 2o, 1931 UNITED STAT-Es LoaA a. room, or ANnnasoN, INDIANA, AssI'GNoa To Immo-nm conro'aATIoN, or

' ANDERSON, INDIANA, A oonroaATIoN or nnLAwAnn :METAL WORKING' 'IMIAGHIIIEv i Application llcd lilly 82, 41929. Serial No. 380,138.

This invention relates to a machine used in the manufacture of field poles and in particu-v lar to a machine for drIllin tapping, and countersinkin holes in el poles. I An object o this invention is to reduce the cost of producin field poles for dynamo electric machines y reducing the time, the.

vide indexing means for the rotary turn table, or dial which requires a very short time for the indexingqand which rovides a suficiently long rest period of t e dial to permit the respective tools to perform their operation*A Another object of this invention'is to secure a uniform product. This'has been accomglished by providing supports for the wor pieces so that each work piece is held in ay predetermined position when it is grippe by the clamps, provided therefor, on the dial. This insures the positioning .of the holes a uniform distance from one of the ends of the work pieces.

Another object of this invention is to r'operly osition the work piece peripheral (y on the ial. This has been accomplishe by providing a Aset of clamps which align'the work pieces.

Another object of this invention is to eliminate the labor re uired to remove the work pieces after all o the operations have been performed. This has been accomplished by providing means for automatically ejecting the work pieces from the clamps after the operations have been performed.

' Further objects and advantages of the present invention will be apparent from the following description, jre erence bein had to the accompanying drawin s, wherein a preferred embodiment of one orm of the present invention is clearly shown. 5 In the drawings:

or in several steps.

Fig. 1 is a plan view of the machine.

Fig. '2 is a sectional view taken on the line 2-2 of Fig. 1. vFor convenience Fig. 2 has been drawn as though the section line 2--2 were `a straight line.

Fig. 3 is a sectionalview taken on the line a-s of Fig. 2.

Fig. 4 is a sectional view taken on the line 4 4 of Fig. 2 and of Fig; 3.

Fig. 5 is a sectional 'ew taken substantially on the line 5-5 of Fig. 2.

Figs. 6 and 7 are fragmentary detail views showing the clamps in the open position and in the closed position, respectivel Figs. 8 and 9 are fragmentary showlng a side elevation of the clamps as disclosed in the Figs. 6 and 7. Fig. 9 discloses one of the clamps in section taken on the line i 9-9 of Fig. 7

Fig. 10 is a sectional view taken on the line 10-10 of Fig. 11'.

Fig. 11 is a fragmentary sectional view taken on the line 11--11 of Figs. 1 and 10.

Fig. 12 is a sectional view taken on the line 12-12 .of Figs. 21and 13.

Fig. 13 is a sectional view taken on the line 13--13 of Figs. 1 and 12.

Fi 14 -is a detail view of the reversing clutc disclosed in4 Fig. 13.

Fig. 15 is a sectional view taken on the line 15-15 of Fig. 14.

tail views- Fig. 16V is a fragmentary sectional-view taken on the line 16-16 of Fig. 11.

Fig. -17 is a fragmentary sectional view taken onthe line 17-17 of Fig. 2.

Figs. 1, 2, 3, 4 and 5 have been drawn to a smaller scale than the lotherl figures.

Figs. 14-17 inclusive have been drawn to a larger scale than the other figures.- A

In the manufacture of dynamo-electric machines, especially, of the smaller types, each of the eld poles are attached to the frame by means of a sin le screw extending from the frame threade ly engagin an aperture provided therefor in the vcore o the pole.

At least lthree o rations are required to provide this, name'y, (1) drilling the hole,

S2) countersinking the hole and (3) tapping t e hole. The drillin may be done in one e steps of counterpair of clamps 22 65 .brackets carries a sinking and tapping' may be reversed 'from the order given above.

rln the drawin s the reference character 20 discloses the field poles held inl position b a and 24 which are provi ed with fingers 26 and 28 which engage the edges of thecore of the ield pole'20 as clearly seen in Fig. 7. These clamps 22 and 24 .are pivotall mounted on the pins 3G and 32 extending vt rough the support 34 which is attached to the dial 54 and which is provided with a pair of recesses 'for receiving the clamps 22 and 24. The support 34 is provided with the seats 36 and 38 which support the tips of the pole shoes 20. The clamps 22 and 24 have the fingers 26 and 28 moved into engagement by means of an oval cam 40 engaging the lobes 42 and 44 of the clamps 22 and 24, respectively. Cam 40 is attached to a in 43 provided with a head 45, carrying a andle 46 which rotates the cam either manually or automatically. X

When the handle 46 is moved trom the position` disclosed in Fig. 7, to the position disclosed in Fig. 6, by a mechanism which will be described later, the spring 48 engaging the recesses 50 and 52 actuates the lobes 42 and 44 toward each other thereby spreading the lingers 26 and 28.

The driving mechanism for the rotary turn table 54 as best seen in Figs. 2-4 includes a speed reducing unit 'driven by an electric motor not shown. The speed reducing unit 60 comprises a driven shaft 62 journalled in the bearings 64 and 66 and carrying a gear 68 meshin with a gear 70 freely rotatable on the sha 72, journalled in the bearings 74 and 76. Integral with the gear is a driving clutch member cooperating with a driven clutch member 77 splined on the shaft 72.

A clutch controlling handle 78 pivoted on the p pin 80 terminates in a bifurcated end 82 carrying the pins 84 and 86 which cooperate with an annular recess 88 in the movable clutch member 77 as best seen in Fig. 4. worm 90 keyed to the shaft 7 2 meshes with the worm gear 92 keyed to the shaft 94, connected to a shaft 96 by a coupling 98. rihe shaft 96 is in the bracket 100 carried by the frame 102 and carries an elliptical gear 104 which meshes with an elliptical gear 106, keyed to the shaft 108, journalled in the bearings and 112, seated in bracket 100. The plate 114 keyed 55 to the shaft 108 carries the Geneva gear driving member 116 which cooperates with the Geneva gear driven member 118, carried to the shaft 56, to drive the rotary dial 54 through member 122 keyed to the shaft 56 69 .and adjustablv connected to the rotary dial 54. Member 122 as best seen in Fig. 1, has a pair of arms 124 and 126, positioned between the brackets 128 and 130 and the brackets 132 and 134, respectively. Each of these set screw 136 which is used journalled in the end thrust bearing 99, seated aeeaava in adjusting the relative position of dial 54 with respect to the shaft 56 and the Geneva gear driven member '118. As best seen 1n Figs. 3 and 4 the part 140 which is secured by screws 142 to the plate 114 is a usual Geneva gear locking member which coo erates with a cylindrical recess 144 of the eneva gear driven member 118. By providing elliptical gears for driving the driving member 116 of the Geneva gear, member 116 is rotated very rapidly while engaging the driven member 118 so that a short time interval is required in indexing the work support dial 54, leaving more time for the tools to operate on the work piece which will be'described later.

Brackets 150, 152, 154, 156 and 158 which are each attached to the frame 102 by suitable screws not shown slid'ably support the tool carriers 160, 162, 164, 166 and 168 respectively. The carriages 160, 162, 164, and 166 are identical in construction, one of which is shown in section in Figs. 10, 1l and 16, which will now be described.

The stub shaft 170, connected to the motor 172 through the flexible coupling 174, has lixedly attached thereto a gear 176 which is provided with journals -178 and 180, journalled in the bearings 182 and 184 mounted in the frame 186. The gear 176 meshes with a gear 188 which is provided with journals 190 and 192 journalled in the bearings 194 and 196 supported in the frame 186 and which is keyed to a spindle 198. The nut 200 threadedly engaging the spindle 198, cooperates with a shoulder 202 integral with the spindle 198 to prevent endwise movement of the spindle 198 with respect to the non-rotatable quill 204. The end thrust bearings 206 and 208 permits the spindle 198 to be freely rotat/ed even though there is an end thrust upon the spindle 198 from the tool which will appear more fully later. The gear 176 also meshes with a gear 210, journalled in the bearings 212 and 214 and keyed to the spindle 216 which is journalled in the end thrust bearings 218 and 220 located at each end ci the non-rotatable quill 222., The 'spindles 198 and 216 carry each a chuck 224 only one of which is shown. The details of the chuck 224 have not been shown for the reason that these do not form a part of this invention and for the reason that their construction is well known to a person skilled in the art.

The tool 228 which is shown as a drill is held and rotated by the chuck 224 and journalled in the bearings 232 carried by a buffer 236, attached to a quill 238, by the screws 240 and 242. A nut 244 threadedly engaging a reduced end of a suitable stub shaft 246 holds the quill 238 in position. The shaft 246 is non-rotatably mounted in a recess provided therefor in the frame 186 by a screw 247 engaging a set screw 'seat 249. Rotation of a uill 238 is prevented by a key 248 passing t rough the shaft 246 and extending into the A Larsen longitudinallslots 250 and 252 diametricall arranged in the quill 238. Whenever the bu abutting quill 238 and the collar 256 integral tools and guide them.

with the stub shaft 246. The bearin for the drills and the buer may be omit from all the carriages excepting carriage 160 as the .hole in the pole shoe started b the drills in the first carriage will align t e succeeding Whenever it is found necessa to substitute Aa new tool for the tool 228, it 1s necessary to adjust the position of the quills 204 and 222 and the spindles 198 and 216 with respectto each other due to the unevennessof the length of various tools caused by sharpening etc. In order to accomplish this, a gear 260 located in the aperture 262 in the frame 186 meshes with the teeth 264 on the quill 204, and a gear 266 located in the opposite end of the aperture 262 and engaging teeth provided therefor, not shown, on the quill 222 are used to adjust the quills 204 and 222 outwardly or inwardly w1th respect to the frame 186 and' with respect to each other upon the loosening of the nut 268, threadedly engaging an end of the bolt 270 passing through the gears 260 and 266. After the quills 204 and 222 have been adjusted the nut 268 is tightened` so as to prevent movement of the ears 260 and 266 thereby holding the quills 1n adjusted position. L

As the-carriages 160, 162, 164 and 166 'are reciprocated on the brackets 150, 152, 154 and 156, respectively, by a driving mechanism which will be described later, the tools carried by each of the carriages are brought into working relation with the eld poles 20, car- -ried by the dial 54, so as to drill a hole in each of the field poles and countersink this hole. Preferably the tools in the tool carriages 160, 162 and 164 are drills for making the holes and'the tools carried by the tool carriage 166 are tools for countersinking the holes previously drilled. That is, the drills carried b carriage 160 drills in each pair of field po es, holes about one-thirdl ways through the field pole located at station A in 1. After this has been done the dial 54 is indexed to position B, where the drills carried by the tool carriage 162 drills the second 55' vAfter these lield poles have been positionedone-third distance through the iield poles.

f at station C by indexing of the dial 54, the

remainder of each of the holes is drilled by the drills carried by the tool carriage 164. When the field polesare'moved to position D by indexinfg the dial 54, the holes are countersunk bythe counters'inking tools carried by the tool'carriage 166.- When the pole shoes located at D are Amoved to station E, the holes are tapped or threaded by the taps carried a gear 298, which is keyed to a tubularl sleeve- 300,. journalled in the bearings 302 and 304.

A pinion 306 `which is keyed to the tubular sleeve 300, meshes with a pinion 308, resting on the end thrust bearin'g'310, journalled on the stub shaft 312. The pinion 308 meshes with the pinion 314, keyed to a tubular sleeve 316, coaxial with the tubulark sleeve 300. Through this driving mechanism the tubular sleeve 300 is rotated 1n the opposite direction from tubular sleeve 316. A spindle 318 is journalled in the bearings 320, 322 which vare press fitted into the tubular sleeves 300 and 316 respectively and in bearing 323-carried by the frame 296. A pair of projections 324 and 326 form teeth which cooperate with shoulders 328 and 330 on the tubular sleeves 300.

and 3 16, respectively to rotate the spindle in one direction or the other dependingupon which sleeve the teeth engage. The pro ections 324 and 326 extend alon the shagt a distance equal to slightly less t an the minimum distance between the ends of the tubular sleeves 300and 316. The projections 324 and 326 are provided with the parallel faces 332 and 334, which lie in planes normal to the axis of the spindle 318. The faces 332 and 334, lie on each side of the plane,`determined by the bisector of the two projections and the axis of 4the spindle. The projections also terminate in the beveled surfaces 336 and 338, the surface 336 cooperating with the inclined surface 340 of ther sleeve 300 to drivingly disconnect the spindle 318 from the ytubular sleeve 300 upon the happening of certain events which will appear more fully later, and the beveled surface338 cooperating with the inclined surface 342 to drivingly dis-` connect the spindle 318 from the sleeve 316` upon the happening of certain other events.

After the tool carriage 168 is' moved towards the left as viewed in Fig. 13, the spindle 318 will be stopped in its movement towards the left when the tool carried there-l so'LA upon reversal of the tooll carri 168 so that it is advanced towards the rig t as viewed v in-Fig. 13, the ta carriage 168, thereby releasing the driving engagement between the tubular sleeve 300 and the spindle 318. The shoulder 330 on the tubular sleeve 316 Will come in contact and drivingly engage either the shoulder 331 on the projection 324 or the shoulder on the projection 326, so as to canse the spindle 318 to rotate in the opposite direction, thereby retiracting the tap from the hole in the field o e. i p The gear 286, also meshes with a gear 350, 'ourna-lled in the bearings 352 and 354, and

eyed tothe tubular sleeve 356. The pinion 358, keyed .to the sleeve 356 meshes with a gear 360 which rests on an end thrust bearing and i`s journalled on aistub shaft not shown,

and which meshes with`a gear 362,keyed toV the tubular sleeve 364, thereby drivin the sleeve 364 in a direction'opposite to the 'rection of rotation of the tubular sleeve 356.

The spindle 366 which is identical in construction to the spindle 318 is journalled in the bearings 368 and 370, press fitted in the tubular sleeves 356 and 364 and in the bearing 371 carried by the frame 296. This spindle is provided with a pair of projections forming the teeth 324 and 326 which are identical to the teeth described in connectionwith the spindle "318.v From the description of the reversing of the spindle 318 it can readily bel seen that the direction of rotation of the spindle 366 is reversed upon the reversal of the tool carriage 168.

The driving mechanism for reciprocating the carriages 160, 162, 164, 166 and 168 includes a pair of integral cams 37 0 and 37 2, attached to a wheel 374, carrying a gear 376 which meshes with a gear 378, keyed to the rotating shaft 96. The wheel 374 rests on the.

end `thrust bearin 380 and is journalled on the bearin 382, integral with the support 384, carrie by a substantially annular member 386, supported on the frame 102. The pitmen 390, 392, 394 and 396 are adjustably attached to the lugs 400, 402, 404 and 406 which are attached to the carriages 160, 162, 164 and 166 respectively. The pitmen 390, 392, 394 and ,396 are also attached to the slid# ing guides 410, 412, 414 and 416 respectively which are guided radially in the radial slots 430, 432, 434 and 436 in member 384 and which carry the cani followers 420, 422, 424 and 426, respectively. From this construction it can be readily seen, that as the cam 370 is rotated the cam followers 420,422, 424 and 426, will cause the tool carriages to be reciprocated towards and away from the work. By adjusting the nuts that attach the pitmen to the lugs, the relativev distance from the dal 54 o sie e015' man by' alma 'me ri es may be adjusted.

the other end threade 1y engadgling the sliding guide 418, guided in the ra al slot 438in member 384. The guide 418 'carries -a cam follower 428, which cooperates with the cam 372 to actuatethe carriage 168 towards and 'away from the pole ieces, carried by the dial 54. It can be readi y seen from the contour of the two cams 270 and 272 that the carriage 268 will be reciprocated much further than the other carriages. The reason for this unfequal length of reciprocation is that the tool carried by the carriages 160, 162 and 164, penetrate the work onl one-third the distance of the thickness o the work piece land the tools carried by the carriage 166 only countersink the holes while the taps carried by. tool carriage 168, necessarily have t0 travel through the entire holes before comi pleting their operation.

I VOperation, Theoperator places the field pole between the fingers 26 and 28 with the tip of the pole shoe resting on the shoulders 36 and 384and the lower edge of the field pole resting u on .the support 450 or 452 carried by the brac ets 454 and 456, respectively, each of which are attached to the sup ort 384 at station F as best seen in Figs. 1 and 9. By placing the lower end of the field pole onthe sup ort 450 and 452, as the case may be, the ho e to be drilled, countersunk, and tapped will always be the same distance from one end of eve field pole operated upon. After the field pole has been so positioned the operator rotates the handles 46 in a clockwise direction as viewed in Fig. 1, so as'to cause the fingers 26 and 28 iet of the held pole, thereby adjusting the iield pole peripherally so that the center of the hole to be drilled will bisect the distance between the shoulders 27 and 29 and the distance between the tips 36 and 38. After the iield oles thus inserted are positioned at station dexing thedial 54 twice, the drills carried by the tool carriage 160, will drill one-third distance through the pole piece during a rest period of the dial 54. After the tool carriage has been retracted the cam followers travel in the circular portion 460 of the cam 270, or in the circular portion 462 of the cam 372, as the case may be, during the'indexing of the dial 54. When the field oles are at sitionl B the second one-third of the ho e is drilled by the tool carried by the tool carriage 162, etc., until all of the operations have been performed'at stations A, B, C, D and E. When the field poles pass from station E to station F, the handles 46 come in contact with a trip or release 470, attachedto the supiis the lobes 42 and 44 towards each other there--A by spreading the fingers 26 and 28, thus releasingthe pole shoes which are discharged through the chute 472 into a Asuitable receptacle not shown. Whenever it is desired to stop the machine, the operator actuates handle 78cwhich disengage's the clutch;

It can be readily seen that this machlne will perform all the 'aforementioned operau tions on. the field poles automatically, after they have been inserted by the operator at station F. By performing all of these operations in one machineA which is handled by one operator, the cost of producing field poles is greatly reduced and a more uniform product is secured. p

While the form of embodiment of the present invention as herein disclosed, constitutesa preferred form. it is to be understood that 'cams in a eating the tool carriages towards and from the pole piece during arest period of the dial so as to permit the drill to operate on one pole piece, so -as to countersink the hole in the preceding pole piece and so as to tap the hole in the preceding pole piece, said cam means including a plurality of concentric d l plane parallel to the plane of the 1a A v In testimony whereof I hereto afiix my signature.

LORA E. POOLE.

other forms might be adopted, all coming within the scope of the claims which follow. y

'What is claimed is as follows:

1. A. machine or operating` upon field pole i i 2. machine for operatingI upon field poles comprising, 1n combination, a tool for operating upon said field pole: a rotary dial for presenting the field pole to the operating tool,l clampinsrmeans vfor clamping;` the field pole to the'dial. said clamping means in- Aclinilins a pair ofclampseach clamp compris- 55 and tapping holes in field pole pieces com` iner a finger and a lobe: cam means enfraszing each lobe therebv causing: the fingers to grip the core of the field pole: a Genevay gear drivina` mechanism for indexingI the dial so as to present the field pole to the-operatinxr tool: and-elliptical gears for drivin the Geneva vea-r driving mechanism. said elliptical nears being so arranged as to require a short integral of time to index the rotary dial so as to leave more time for the tool to operate upon the eldpole during` the rest period of the dial.

3. A machine for drilling, countersinking,

prisinsr. in combination, a drill: a carriage for said drill: a countersinkinq tool; a carriage for said countersinking tool: a tap: a carriage for said tap; a rotary dial for prel0 senting the pole pieces toeach of said tools;

05 of. said tools; and lcam-.means for reciproclamps on said rotary dial for clamping the pole pieces in position; a. Geneva gear driving mechanism for indexing the dial so as to position a pole piece in alignment wlth each lao. 

